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Author Topic: Is methane an acid or base or salt?  (Read 12645 times)

Offline taregg

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Is methane an acid or base or salt?
« on: 25/04/2013 23:24:45 »
same question....
« Last Edit: 26/04/2013 11:52:53 by evan_au »


 

Offline damocles

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Re: does methane is acid or base or salt
« Reply #1 on: 26/04/2013 02:09:34 »
Straightforward answer:
Acid/base/salt is not a classification scheme that is exhaustive of all chemical substances. Methane is a substance that does not really fit in with that classification scheme.

A bit more sophisticated:
Methane is an extremely weak acid, because it has a very slight tendency to react to form H+ + CH3-
 

Offline CliffordK

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Re: does methane is acid or base or salt
« Reply #2 on: 26/04/2013 05:51:03 »
Methane is considered to be a covalently bonded compound, whereas salts have ionic bonds.

As Damocles mentions, one normally would not consider methane, ethane, and such compounds as acids, but there may be a slight tendency for a carbon hydrogen bond to be broken.  This is most commonly done with say an alcohol, such as Methanol (extremely weak acid) & Sodium Methoxide (conjugate base).  It can also be done with acetylene & sodium acetylide. 

One can, however, also describe methane or ethane and their conjugate bases, sodium methide and sodium ethide (I think) which would be some of the strongest organic conjugate bases. [?]  Hmm, I'm finding only brief notes on it on the internet.  Perhaps BC will say I'm imagining things.
 

Offline chiralSPO

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Re: Is methane an acid or base or salt?
« Reply #3 on: 11/08/2013 00:51:14 »
Methane is not a salt, it is a neutral, covalently bonded molecular compound. It is a very weak acid (which can be deprotonated by very strong bases like t-butyllithium), and a very weak base (which can be protonated by very strong acids like "magic acid," which is formed by combining anitmony pentafluoride with fluorosulfonic acid.)
 

The Naked Scientists Forum

Re: Is methane an acid or base or salt?
« Reply #3 on: 11/08/2013 00:51:14 »

 

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